after that, ohio and pennsylvania before returning to boston to watch returns. president obama who voted early last month dropped by a chicago campaign office to thank volunteers. but for both candidates, virginia is one of the battlegrounds they'll be most closely watching tonight. one both have visited in the past four days. >> how are you doing? >> reporter: in prince william county is a battleground within a battle ground. this man is sticking with the president in 2012. >> feel pretty good about it. i think that a lot of policies that he put in place, you don't see it until four years later. >> reporter: this young voter is casting his first ballot for barack obama. >> i did vote obama because he did a lot of changes. for instance, he ended one war in iraq. >> this voter is a change. an obama voter in 2008, the slow improvement in the economy has him making a switch. >> i voted for romney just because of the economy. i like obama. i think he is -- i think we need something changed up to affect the direction of the economy. >> reporter: this woman also says